... :>85dBBass boost/attenuation90dBTreble upgrade/attenuation80dBTweeter unit90Midrange unit90Main speakers:90Distortion: mini usb speaker with fm radio1%Speaker Impedance:4ΩMaximum SPL:28Appearance Material:Aluminum ... alloy Product parametersN.W200gProduct size185*80*50mmG.W220gPackage size mini usb speaker with fm radioColorwhite, black, red,yellowAccessoriesCharging cable, data cable Hot ...